Main application : it is the basic raw material for chemical industry 产品主要用途:基本化工原料。
Formaldehyde is used as one of basic raw materials in syntheses of synthetic tannins 摘要甲醛通常是用于合成鞣剂制备的一种基本原材料。
Sand , as a basic raw material in dry mortar products , is strictly required to its moisture content 砂石,作为干粉砂浆基本原材料之一,其湿度含量要严格地与要求一致。
Application : mainly used for petroleum industry . it ' s the basic raw material of w - base catalyzer used in oil refinery 用途:多用于石油工业生产上,是炼油厂用钨基催化剂的主要原料。
Lime and dolomite are basic raw materials that have made an essential contribution to many of the achievements of our modern world 石灰和白云石是对我们现代社会的很多成就做出重要贡献的基本原料。它们是钢铁